Add README for website

README.md

+# What is IFOS3D?
+
+**IFOS2D** (**I**nversion of **F**ull **O**bserved **S**eismograms) is a 3D elastic full waveform inversion code.  
+The inversion problem is solved by a conjugate gradient method and the gradients are computed in the frequency domain with the adjoint method.  
+The forward modeling is done by a time domain finite difference scheme. 
+
+IFOS2D is the reverse (inverse) of our 3D finite difference forward solver [**SOFI3D**](https://git.scc.kit.edu/GPIAG-Software/SOFI3D).
+
+The [**manual**](https://git.scc.kit.edu/GPIAG-Software/IFOS3D/wikis/home) can be downloaded [here](https://git.scc.kit.edu/GPIAG-Software/IFOS3D/wikis/home).
+
+# Download and Newsletter
+
+You can Download the current [**Beta-Version**](https://git.scc.kit.edu/GPIAG-Software/IFOS3D/tree/master).

par/in_and_out/ifos3d.inp

@@ -73,7 +73,6 @@ P_wave_velocity_near_the_grid_boundary(in_m/s)_(VPPML) = 6200.0
 (no=0)_(left/right/front/back=1) = 0
 #
 #----------------------Snapshots----------------------------------
-# currently not in use!!
 output_of_snapshots_(SNAP)(yes>0) = 0
 # output of particle velocities: SNAP=1
 # output of pressure field: SNAP=2

par/in_and_out/ifos3d_toy.inp

@@ -73,7 +73,6 @@ P_wave_velocity_near_the_grid_boundary(in_m/s)_(VPPML) = 6200.0
 (no=0)_(left/right/front/back=1) = 0
 #
 #----------------------Snapshots----------------------------------
-# currently not in use!!
 output_of_snapshots_(SNAP)(yes>0) = 0
 # output of particle velocities: SNAP=1
 # output of pressure field: SNAP=2